Gaseous Exchange between Organisms and Environment

In aerobic respiration the organisms utilize the environment oxygen to oxidize their organic compounds as a result of which carbon dioxide is produced. The carbon dioxide is toxic to the organism and it is, therefore, necessary that the organism should expel the carbon dioxide out of their bodies in some way.

The aerobic organisms in the process of respiration take up oxygen from their environment and eliminate carbon dioxide from their bodies to the environment. The exchange of gases of between the organisms and their environment from the first stage of aerobic respiration.